Marshall Gatten
First Post
Genesis grows the plane at a cubic foot per day and is not one level higher, but two levels higher. It can't create living things (like food) and can't create structures. But you're saying that Magnificent Mansion, at two levels LOWER, creates 3000 cubic feet of new plane in a standard action and populates it with food and structure? And you don't think that sounds unbalanced? I see Genesis as confirmation that Magnificent Mansion surely can't possibly create its own plane.By the way, all three versions of Genesis are in the d20 SRD. The arcane version is from the Epic Level Handbook, but like some other things from that book, is not actually epic.
Rope trick says nothing of creating extradimensional space - only that the rope reaches into extradimensional space.
A portable hole does say it "causes an extradimensional space to come into being", but it also describes a kinship with bags of holding (which don't have that language) that squarely connect their activities to the astral plane. I even remember something from some TSR publication long ago about Astral travelers being able to sense bags of holding and portable holes though I don't recall the specifics.
The links to Pathfinder's Create Demiplane are a stronger argument, especially since its a lower level spell. But again, it takes hours to create a comparable-sized space and the space is featureless and sterile. Magnificent Mansion takes a standard action and comes with food and structure. I can't see any way to justify saying that it also creates the plane it exists on. Certainly not in a standard action.